Browsing by Author "Hsieh, Kun Min"

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Degradation of InGaN/GaN LEDs under Forward-bias Operations in Salty Water Vapor
(2016)
Chen, Hsiang
;
Hsieh, Kun Min
;
He, Yun Yang
;
Chu, Li Chen
;
Lee, Ming Ling
Forward-bias stress in salty water vapor can quickly degrade the InGaN/GaN LEDs. To examine the weakness of the device, electrical, optical, and material analyses and characterizations were performed to investigate the failure mechanism. Corrosion of the electrode and Au atom diffusion might result in damages of the device. Results indicate that forward-bias stress in salty water vapor can quickly influence the material properties, optical behaviors, and electrical characteristics of the LED device.
ZnO nanoflakes on silver wires with antibacterial effects
(2016-05-01)
Huang, Shen-Che
;
Hsieh, Kun Min
;
Chang, Ting Wei
;
Chen, Yi Cian
;
Yu, Chang-Tze Ricky
ZnO structures were electro-hydrothermally grown on copper and silver wires. To characterize the structures, multiple analyses including field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction and photoluminescence measurements were performed on the ZnO structures on the wires. Results indicate that ZnO nanoflakes were densely deposited on the silver wire but poor ZnO structures were grown on the copper wire. Furthermore, OD 600 antibacterial tests revealed that ZnO flakes on the silver wire exhibited better antibacterial capability than the silver wire without ZnO nanoflakes. Because of possible integration with silver-related materials and flexibility of wire structures, ZnO nanoflake-coated silver wires have potentials for future antiseptic and biomedical applications. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.